All news with #remote access trojan tag

🔍 Researchers at GreyNoise have identified a large-scale, multi-country botnet that began targeting Remote Desktop Protocol (RDP) services in the United States on October 8. The campaign uses over 100,000 IP addresses and employs two RDP-specific techniques: RD Web Access timing attacks to infer valid usernames and RDP Web Client login enumeration to observe differing server behaviors. Nearly all sources share a common TCP fingerprint, indicating coordinated clusters. Administrators should block attacking IPs, review RDP logs, and avoid exposing remote desktop services to the public internet—use VPNs and enable multi-factor authentication.

🔒 DarkAtlas researchers warn that APT groups are leveraging legitimate RMM platforms to gain initial access, increasingly favoring ScreenConnect as it evades basic detection. Attackers abuse features like unattended access, VPN, REST API and file transfer, deploy in-memory installers that leave little disk artefacts, and register persistent services such as ScreenConnect.WindowsClient.exe. Defenders should monitor invite links, config files, in-memory activity and specific event IDs for effective DFIR.

🛡️ GreyNoise researchers uncovered a massive RDP attack wave using more than 100,000 IP addresses across over 100 countries, which analysts link to a single large botnet targeting U.S. Remote Desktop infrastructure. The attackers used two enumeration techniques — an RD Web Access timing attack to infer valid usernames and an RDP Web Client login enumeration to guess credentials — enabling efficient compromise while reducing obvious alerts. GreyNoise published a dynamic blocklist template, microsoft-rdp-botnet-oct-25, and recommends that organizations review logs for unusual RDP access patterns and automatically block associated IPs at the network edge.

🔒 eSentire disclosed a Rust-based backdoor named ChaosBot that leverages Discord channels for command-and-control, allowing operators to perform reconnaissance and execute arbitrary commands on compromised systems. The intrusion, first observed in late September 2025 at a financial services customer, began after attackers used compromised Cisco VPN credentials and an over-privileged Active Directory service account via WMI. Distribution included phishing LNK files that launch PowerShell and display a decoy PDF, while the payload sideloads a malicious DLL through Microsoft Edge to deploy an FRP reverse proxy. ChaosBot supports commands to run shells, capture screenshots, and transfer files, and newer variants employ ETW patching and VM detection to evade analysis.

⚠️ Fortinet FortiGuard Labs has detailed an active campaign dubbed Stealit that uses Node.js Single Executable Application (SEA) packaging—and in some builds, the Electron framework—to deliver credential-stealing and remote-access payloads. Operators distribute counterfeit game and VPN installers via file-hosting sites and messaging platforms, which drop three primary executables that perform browser and messenger data theft, wallet extraction, and persistence with live screen streaming. Installers run anti-analysis checks, write a Base64 authentication key to %temp%\cache.json for C2 authentication, and configure Microsoft Defender exclusions to conceal downloaded components.

🔎 Volexity attributes a series of tailored spear‑phishing campaigns to a China‑aligned actor tracked as UTA0388, which delivers a Go-based implant named GOVERSHELL. The waves used multilingual, persona-driven lures and legitimate cloud hosting (Netlify, Sync, OneDrive) to stage ZIP/RAR archives that deploy DLL side‑loading and a persistent backdoor. As many as five GOVERSHELL variants emerged between April and September 2025, succeeding an earlier C++ family called HealthKick. Volexity also observed the actor abusing LLMs such as ChatGPT to craft phishing content and automate workflows.

🔍 Huntress Labs analyzed a multi-stage intrusion that began with a phishing ZIP and DLL sideloading and escalated to deployment of the commercial PureRAT backdoor. The operator combined bespoke Python loaders and a Python-based infostealer with compiled .NET loaders, process hollowing, AMSI/ETW tampering, and reflective DLL injection to evade detection. Final-stage configuration revealed a Vietnam-hosted C2 (157.66.26.209) and Telegram infrastructure linked to PXA Stealer, underscoring a shift from custom theft to a professional RAT.

🔒 Huntress reported that threat actors with suspected ties to China abused a vulnerable phpMyAdmin panel in August 2025 to perform log poisoning, recording a PHP web shell into a query log and naming the file with a .php extension. The actors used the web shell (accessed via ANTSWORD) to deploy the open-source Nezha agent and inventory over 100 hosts—primarily in Taiwan, Japan, South Korea and Hong Kong. The Nezha agent facilitated execution of an interactive PowerShell script that created Microsoft Defender exclusions and launched Gh0st RAT via a loader and dropper.

⚠️ Attackers linked to China turned a benign open-source network monitoring agent into a remote access beacon using log poisoning and a tiny web shell. Huntress says they installed the legitimate Nezha RMM via a poisoned phpMyAdmin log and then deployed Ghost RAT for deeper persistence. The intrusion affected more than 100 hosts across Taiwan, Japan, South Korea, and Hong Kong and was contained in August 2025.

🔍 Huntress analysts uncovered a sophisticated campaign beginning in August 2025 that used log poisoning to plant a PHP web shell and then manage compromised servers via AntSword. The operators downloaded a file named 'live.exe' — identified as the open-source Nezha agent — which connected to a command server at c.mid[.]al and enabled remote tasking. Nezha was used to execute PowerShell commands to disable Windows Defender and to deploy 'x.exe', a Ghost RAT variant that persisted as 'SQLlite'. More than 100 systems, primarily in Taiwan, Japan, South Korea and Hong Kong, were observed communicating with the attackers' dashboard.

🛡️ OpenAI said it disrupted three clusters that misused ChatGPT to assist malware development, including Russian-language actors refining a RAT and credential stealer, North Korean operators tied to Xeno RAT campaigns, and Chinese-linked accounts targeting semiconductor firms. The company also blocked accounts used for scams, influence operations, and surveillance assistance and said actors worked around direct refusals by composing building-block code. OpenAI emphasized that models often declined explicit malicious prompts and that many outputs were not inherently harmful on their own.

🔎 A Vietnam-linked group tracked as BatShadow is running a social-engineering campaign that lures job seekers and digital marketing professionals with faux job descriptions to deliver a previously undocumented Go-based malware, Vampire Bot. Attackers distribute ZIP archives containing decoy PDFs alongside malicious LNK or executable files that launch an embedded PowerShell script to fetch lure documents and remote-access tooling such as XtraViewer. The lure coerces victims into opening links in Microsoft Edge, triggering an automatic ZIP download that contains a deceptive executable padded to appear as a PDF; once executed, the Go binary profiles the host, exfiltrates data, captures screenshots, and maintains contact with a command-and-control server.

🛡️ Trellix researchers detail the return of XWorm 6.0, a modular Windows malware now supporting more than 35 in‑memory DLL plugins and expanded data-theft and persistence capabilities. The actor associated with earlier releases, known as XCoder, is of uncertain status, but v6.0—advertised on forums in June 2025—appears to address a prior RCE flaw while enabling credential theft, keylogging, screen capture, and optional ransomware. Campaigns use phishing, malicious JavaScript, LNK-based PowerShell chains, and process injection to evade detection and execute plugins directly in memory.

🚨 BI.ZONE warns of a campaign dubbed Cavalry Werewolf that has targeted Russian state agencies and critical industrial sectors using FoalShell and StallionRAT. Attackers used spear-phishing with spoofed Kyrgyz government emails and RAR attachments to deploy lightweight reverse shells and a RAT that exfiltrates data via a Telegram bot. Observed tooling and Telegram commands indicate organized post-compromise operations and use of socks proxies for lateral movement. BI.ZONE links the activity to groups including Tomiris and YoroTrooper, suggesting possible Kazakhstan ties.

🛡️ FortiGuard Labs reports that the long-running cyber-espionage group Confucius has shifted tactics against Microsoft Windows users, moving from document stealers like WooperStealer to Python-based backdoors such as AnonDoor. The change, observed between December 2024 and August 2025, favors persistent access and command execution over simple data exfiltration. Researchers describe layered evasion and persistence techniques including DLL side-loading, obfuscated PowerShell, scheduled tasks and stealthy exfiltration to minimize detection. Targeting remains focused in South Asia, particularly Pakistan.

⚠️ Cybersecurity researchers flagged a malicious PyPI package named soopsocks that claimed to provide a SOCKS5 proxy while delivering stealthy backdoor functionality on Windows. The package, uploaded by user 'soodalpie' on September 26, 2025, had 2,653 downloads before removal and used VBScript or an executable (_AUTORUN.VBS/_AUTORUN.EXE) to bootstrap additional payloads. Analysts at JFrog reported the executable is a compiled Go binary that runs PowerShell, adjusts firewall rules, elevates privileges, performs reconnaissance and exfiltrates data to a hard-coded Discord webhook.

🔒 Klopatra is a newly observed Android banking and remote access trojan distributed via a sideloaded dropper app called Modpro IP TV + VPN that has infected over 3,000 devices across Europe. The malware abuses Android Accessibility to capture inputs, exfiltrate clipboard content, simulate taps and gestures, and monitor screens. A concealed black‑screen VNC mode lets operators interact with devices and perform manual bank transactions while the device appears idle. Cleafy notes extensive anti-analysis protections, use of commercial packers, and active development since March 2025.

⚠ The Computer Emergency Response Team of Ukraine (CERT‑UA) warns of targeted attacks using a new backdoor dubbed CABINETRAT distributed via malicious Excel add-ins (XLL) concealed inside ZIP archives shared over Signal. The XLL implants an EXE in Startup, places BasicExcelMath.xll in the Excel XLSTART folder and drops a PNG that hides shellcode. It employs registry persistence and robust anti-VM checks, and the C-based backdoor performs reconnaissance, remote command execution, file operations and data exfiltration over TCP.

⚠️ Cleafy's Threat Intelligence team discovered a previously unknown Android Remote Access Trojan named Klopatra in late August 2025, actively targeting financial institutions across Spain and Italy. The malware leverages commercial-grade protection (notably Virbox) and shifts much of its functionality into native code to evade detection and frustrate reverse engineering. Operators use Hidden VNC, dynamic overlays and abuse of Accessibility Services to harvest credentials and perform unauthorized transactions while victims remain unaware.

🔒 Forcepoint Labs describes a multi-stage phishing campaign that delivers the XWorm remote-access trojan via an Office .xlam attachment embedding an OLE native stream. An encrypted shellcode launches a .NET dropper that uses steganography and reflective DLL loading to unpack successive in-memory stages, minimizing on-disk artifacts. Attackers leverage API hashing, unhooked calls and layered encryption to evade sandboxes and traditional scanners; Forcepoint provides IoCs and detection recommendations.